Module: CouchbaseOrm::EmbedsMany

Included in:
Base
Defined in:
lib/couchbase-orm/utilities/embeds_many.rb

Instance Method Summary collapse

Instance Method Details

#embeds_many(name, class_name: nil, store_as: nil, validate: true) ⇒ Object 



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# File 'lib/couchbase-orm/utilities/embeds_many.rb', line 5

def embeds_many(name, class_name: nil, store_as: nil, validate: true)
  storage_key = (store_as || name).to_sym
  attribute storage_key, :array, type: :hash, default: []

  instance_var = "@__assoc_#{name}"
  klass_name = (class_name || name.to_s.singularize.camelize)

  set_embedded(name, {
    type: :many,
    class_name: klass_name, # store as string, resolve later
    key: storage_key,
    name: name,
    instance_var: instance_var,
  })

  validates_embedded(name) if validate

  # Lazy class resolution method
  define_method("_resolve_embedded_class_for_#{name}") do
    @__resolved_classes ||= {}
    @__resolved_classes[name] ||= begin
      klass_name.constantize
    rescue NameError => e
      warn "WARNING: #{klass_name} could not be resolved in #{self.class.name}: #{e.message}"
      raise
    end
  end

  define_method(name) do
    return instance_variable_get(instance_var) if instance_variable_defined?(instance_var)

    klass = send("_resolve_embedded_class_for_#{name}")
    embedded_objects = read_attribute(storage_key).map do |raw|
      obj = klass.new(raw)
      obj.embedded = true
      obj
    end

    instance_variable_set(instance_var, embedded_objects)
  end

  define_method("#{name}=") do |val|
    klass = send("_resolve_embedded_class_for_#{name}")

    embedded_objects = []
    serialized = []

    Array(val).each do |v|
      obj = v.is_a?(klass) ? v : klass.new(v)
      obj.embedded = true
      raw = obj.serialized_attributes
      raw.delete('id') if raw['id'].blank?
      embedded_objects << obj
      serialized << raw
    end

    write_attribute(storage_key, serialized)
    instance_variable_set(instance_var, embedded_objects)
  end

  define_method(:"#{name}_reset") do
    remove_instance_variable(instance_var) if instance_variable_defined?(instance_var)
  end
end